Hi Peng, For a given bandwidth, the capacity of a channel is function of the signal to noise ratio. Neither the noise, nor the signal alone, but what matters is how larger is the signal with respect to the noise. In fact, you should treat as noise any other channel disturbance, like interference.
If there is very low noise floor but the transmitter is very far away, the S/N ratio will still be low. However, you could parametrize your set-up, with a lot of assumptions, like number of nodes, maximum and minimum transmitting power, maximum and minimum distance between Tx and Rx, channel model, etc. Then, you could establish bounds in the performance. But I do not know whether this is what you have in mind... Cheers! Sergio On Tue, May 31, 2011 at 8:14 PM, Peng Du <[email protected]> wrote: > Hello everyone, > > I have been wondering the significance of the noise floor (in this > context, the RSSI value read from the register when no communication > is underway). Does it in some way reflect the likelihood that packets > sent in certain channel will be successfully received (The Packet > Delivery Rate)? > > I would guess channel with lower noise floor should be more > preferable. But does anyone have any opinion or could point me to some > useful resource that explains this? > > Thanks very much! > > Best regards, > > Peng > _______________________________________________ > Tinyos-help mailing list > [email protected] > https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help >
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